Type-writing machine.



O. J. ROLLEFSON. TYPE WRITING MAGHINE. APPLICATION FILED 00T.16, 1907;

Patented Feb. 9, 1-909.

3 SHEETSSHEET 1.

mrmi c. J. ROLLBFSON.

TYPE WRITING MACHINE. APPLICATION FILED 00T.16, 1907.

Patented Feb. 9, 1909.

3 SHEETS-SHEET 2.

' awuanfoz C. J. ROLLEFSON.

TYPE WRITING MACHINE.

APPLIOATION FILED 00T.l6, 1907.

. 91 1,842, Patented Feb. 9,1909.

. J 3 QHEETS-SHEET 3.

Snuanfoz panying drawings in which CARL J. noLLEFsoN, orELIQSWORTHMWISCONSIN. j

TYPE-WRITING MACHINE.

no. 91' 1,s42.

\ To all whom it may concern:

Be it known that I, CARL J ROLLEFSON, a-c-itizen of the United States,residing at Ellsworth, in the county of Pierce and State 5 of Wisconsin,have invented certain new and useful Improvements in Type-WritingMachines, of which the following is a specification.

Myinvention relates to typewriting ma-, chines and has for its objectthe improvement of the keyboard and operation of the printing mechanismby which. two letters may be printed simultaneously. or the final letterat theend of a word may be printed and the space following the wordprovlded for atone stroke. I have found by actual experiment that thenumber .of times that a I letter is followedby .one of the vowelsincluding y orthe space at the end of the word is between thirty-fiveand forty per .cent. of the strokes necessary operating a typewritingmachine.

My invention contemplates the provision of extra keys at either or bothends of the keyboard of an ordinary typewriter or in any otherconvenient position and have them connected with extra type armsarranged to strike the platen one space to the right of the ordinary tye arms, said type arms being assigned to the etters a e i o u and y andone extra key in each set being assigned to space.

I have described a difler'ential s acing mechanism hereinafter that isapplica le to a certain class of machines and it will be understoodthat, some: "form of differential spacing mechanism will be necessaryin' every 1 My invention will be described in detail hereinafter andillustrated in the accom- Figure 1 is a view of a keyboard showing mylmproved arrangement Fig. 2, ,adiagrammatic view showing the manner of.connectmg the respective keys for simultaneous operation, Fig. 3, a view1n elevation of" a pair of keys showingt'he means to connect them forsimultaneous operation, Fig. 4, a

view showing the arrangement of the type bars in the basket, Fig. 5, afragmentalside escapement.

Specification of Letters Patent.

Application filed October 16, 1907.- Serial No. 397,641. I

to be made in view of the escapement, Fig. 6, an end view. showing theoperating mechanism for theescapement, and Fig. 7, aplan :v'iew of thePatented Feb. 9, i909.

ters indicate corresponding parts throughout the several views.

As hereinbefore stated my invention consists essentially in providing anextra set of typebars in a typewriting machine and connecting them wlthextra keys on the key.

board and so arranging the keys and type bars that any one of them maybe struck simultaneously with one of the regular keys on the key boardso that twoletters may be written simultaneously or the final letter ofa Word and the space following it may be formed at one stroke. To thisend my invention consists in adding a number of type bars 1 at the rightside of the basket of bars ordinarily found in a typewriting machine andindicated at 2. Type-bars 1 are so hung that they strike the paper one sace to the right of the position that the or inary type bars strike 1t.On the keyboard, shown m Fig. 1, thevkeys ordinarily found thereon areindicated by 3, said keys being 0 eratively connected with the type bars2, w ile 4 indicates keys 0 eratively connected with type bars 1 so t atone ofthe keys 3 and one of the keys 4 may be depressed at one time andtwo letters be written together. r

In the drawings I have shown two sets of extra keys 4, one set at eachend of the keyboard, and shown keys assigned to the letters 0 u and andone key in each set assigned to Space. The

extra letter keys at the right of the keyboard only areconnected-directly with the type bars for writing the respective lettersand in order that the letter keys at the left end of the key board mayactuate the type e bars, it is neoessarythat the keys at t left beoperatively connected with the keys at the right of the keyboard andthis I have shown in Figs. 2 and 3. The means for connecting the extrakeys of each letter for simultaneous operation consists of rods 5pivotally secured together at one end and aving their other endspivotally secured to the keys at the right and left of the keyboard foreach letter while each rod is pivotally secured intermediate of its endsto a suitable support as shown, at 6.

For the successful operation of my improved typewriter it will benecessary to provide a spacing mechanism so arranged that when one ofthe keys 3 only is operated the carriage will move forward but onecarriage will move forward two spaces and the copy be carried forward sothat it will be in the proper position to receive an impression from oneof the type bars 2. The difierential spacing mechanisms will vary inconstruction with the diiferent constructions of machines to which myinvention will be attached but in the drawings I have shown one form ofspacing mechanism which I will proceed to describe.

7 indicates a ratchet bar which is secured,

to the carriage 7 of the machine, said ratchet bar being pivotallymounted so as to raise and lower for the successful 0 eration of thespacing mechanism as in mac lines of this class.

8 indicates a plate secured to the frame of the machine having atransverse slot 9 in one end and two recesses 10 and 11 thereinconnected by a slot 12 in the partition wall 13 between said recesses 10and 11. Slot 9 is formed to receive dog 14 ivotally secured to one endof lever 15 which has its other end connected by rod or rods 16 withcross bar 17 that hangs under the key bars 18 connected with keys 3.

19 indicates a sliding detent mounted in recess 10 having a bar 20 onits rear end that extends through slot 12 into recess 11, and 21indicates an expansible coil spring mounted in said recess 11 andbearing against the end of bar. 20.

22 indicates a lug or projection on detent 19 that engages the teeth ofratchet bar 7 to stop the movement of the carriage 7 23 indicates atransverse slot in the end of recess 10 adjacent to slot 9 and 24 a stopslidably mounted therein and secured to rod 25 connected with cross bar26 that is on a lower plane than cross bar 17 and ada ted to be engagedby a projection 27 on eac of the bars 28 connected with the extra keys4.

The operation of the differential spacing mechanism is as follows: Whenone of the ordinary keys 3 only is depressed the key bar 18 securedthereto actuates the type .bar 2 connected therewith, and at the sametime by depressing the cross bar 17 and the end of lever 15, connectedtherewith, raises dog 14 into engagement with ratchet bar 7 which israised out of engagement with lug or projection 22 on detent 19. Detent19 is actuated by spring 21 and driven forward until it engages stop 24.When pressure on key 3 is released and it resumes its normal positionthe dog 14 descends and with it the ratchet bar 7 which again engagesthe lug 22 on detent 19 one space removed from its former engagementtherewith and when the dog is released from engagement with said ratchetbar the carriage and ratchet bar together with detent 19 are carriedalong under the impulse of the carriage actuating means (not shown), andagainst the resistance of spring 21, until the rear end of the detentstrikes partition 13, and the motion of the carriage arrested, and themachine is in .position for another stroke.

When one each of the keys 3 and 4 are depressed the operation ust abovedescribed is repeated except that the projection 27 on the key bar 28connected with the key 4 that is actuated depresses cross bar 26 andwith it stop 24 so that instead of the detent 19 being stopped by saidstop 24 it is projected the full length of recess 10 and when theratchet bar 7 is lowered, by releasing the pressure on dog 14, the lugor projection 22 engages it two spaces removed from its former positionand the carriage moves forward two spaces instead of one.

Having thus described my invention what I claim is 1. In a typewriter,in combination with the ordinary set of type bars, a secondary set oftype bars arranged to make an impression to the right of the ordinaryset, keys operatively connected with the ordinary set of type bars, andtwo sets of secondary keys one set arranged at each side of the lastmen-- tioned keys and operatively connected with the secondary set of tye bars, substantially as shown and described 7 2; In a typewriter, incombination with the ordinary set of type bars, a secondary set arrangedat the right of the ordinary setand adapted to be actuatedsimultaneously therewith, keys operatively connected with the ordinarytype bars, two secondary sets of keys assigned to the same characters,said secondary sets of keys being arranged at each side of the firstmentioned keys, and opera tive connections between said secondary setsof keys and the secondary set of ty e bars, substantially as shown anddescribe c 3. In a typewriter, in combination with the ordinary set oftype-bars, a secondary set assigned to a portion of the characters usedin the first-mentioned set, keys operatively connected with the ordinaryset of type bars, two sets of secondary keys, one

set arranged at each side of the last mentioned keys and operativelyconnected with the secondary set of type bars, the ordinary set of keysbeing adapted to be actuated to the exclusion of the secondary set orsimultaneously therewith, and mechanism by which when the ordinary setof type-bars are alone operated the carriage will move forward but onespace, and'when the secondary set of type-bars are actuated inconjunction with the ordinary set the carriage moves forward two spaces.

4. In a typewriter, in combination with the keyboard and the usual setof keys and type bars, a secondary set of type bars assigned to aportion of the characters used in the usual set, said secondaryjtypebars'jbeing arranged to strike the copy one space to'the right of theordinary set, and extra keys at each end of the usual set of keysassigned to the characters-to which the secondary set of the ordinarytydpe bars, two. secondary sets,

of keys arrange at the two sides of the ordinary set of keys, thesecondary set at the right side connected directly with the secondaryset of type bars, and the secondary set at the left of the keyboardoperatively connected with-the secondary set at the right of the boardso as to actuate the secondary type bars, substantially as shown anddescribed.

6. In a typewriter, in combination with the ordinary set of type bars, asecondary set arranged at the right of the ordinary set and ada ted tobe actuated simultaneously therewit keys operatively connected with theordinary typebars, two secondaryv sets of keys arraned at the two sidesof the ordinary set' 0 keys, the secondary set, at the right sideconnected ,directly with the secondary set of type bars, levers suitablyfulcrumed and pivotally secured together in pairs and one of each pairof levers operativel'y connected with the secondary keys at the twosides of the keyboard assigned to the same characters, substantially asshown and described.

In testimony whereof I hereto aflix my signature in the presence of twowitnesses.

\ CARL J. ROLLEFSON.

